[Elecraft] Toroids frequency range and baluns

[Wes Stewart]

Ron wrote:

> So-called "baluns" that transform impedances are, typically, transformers --
often transmission-line transformers.

There is a type of "choke" balun that is both a balanced-to-unbalanced device and an impedance transformer at once.

Connecting two ferrite-loaded transmission line baluns in parallel at one end and series at the other will yield a 4:1 transformation.  Higher ratios are possible with more series/parallel combinations.

Wes  N7WS